PORT ORANGE -- A Winter Springs motorcyclist became the fourth Bike Week traffic fatality Monday night in a collision with a car on Dunlawton Avenue at the intersection with North Swallowtail Drive, Port Orange police said.

The biker, Thomas J. Niedziejka, 63, died early this morning, less than eight hours after the crash. The victim was riding his 2012 Harley-Davidson without a helmet westbound on Dunlawton in the center lane when Ruthann K. Mscisz, 68, of Daytona Beach Shores, was turning her 1999 Infiniti 4-door onto Dunlawton after stopping at the intersection and onto Dunlawton, police said.

The Winter Springs man is the fourth Bike Week fatality so far.

Here is a synopsis of the 8:30 p.m. Monday accident as described by Asst. Police Chief Wayne Miller: "As Mscisz turned onto Dunlawton Avenue, she did so attempting to cross the west bound lanes of Dunlawton Avenue to proceed to the left inside lane. The motorcyclist endeavored to brake and take evasive action to avoid the sedan. The motorcyclist went down on (the) left side and the front of the motorcycle subsequently collided into the left side of the sedan."

The victim was transported by EVAC to Halifax Hospital in Daytona Beach for medical care, where he was pronounced dead t 3:35 this morning.

AM on 03/13/2012, the motorcycle driver was pronounced deceased by hospital officials. His name is being held pending notification of next of kin as is the autopsy. The driver of the car was not injured.

The accident remains under investigation.